farfli | 98a8d2c8d5c9f5c5b70bb2c5a63f02df184785cd56216a2a3a7c9f17ae481cac

General

Target
2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe
Size 235KB
Sample260720-cbemhaew5z
SHA256 98a8d2c8d5c9f5c5b70bb2c5a63f02df184785cd56216a2a3a7c9f17ae481cac
MD5 0ba781ab7666ee3efb6af55edfaecb3c
SHA1 20579e370cd73b2c5b4b9af63d826cf05cf25448
SHA512 81fa29c02eb398bd52580da2fc00e56185b1d1d7157f02f23e5716f589830a7d6ee329fdd57408066caeca2d6f6ee9bd85a9a101cd4b7e82386d9fc9a83b5b5e
SSDEEP 6144:yOFgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSo:zgmYA/nsYf8QdsINkZ6CQetF
TLSH
T1AF34F18136A6DD77F06217BD0D7B163A8137BE691B00B49BD3C4AD4FB4315E4AE2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli gh0strat persistence rat spyware stealer

Malware Config

Extracted

Family

gh0strat

C2

98.126.40.18:3204
http://98.126.40.19:805/index.php
http://98.126.40.20:803/

Attributes

user_agent
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C))

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli
Family: Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat

Detects Farfli Backdoor 2 IoCs

resource	yara_rule
behavioral2/memory/5816-8-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli
behavioral2/memory/5816-11-0x0000000010000000-0x000000001006D000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/5816-8-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/5816-11-0x0000000010000000-0x000000001006D000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000001b888-1.dat	UPX

Deletes itself 1 IoCs

pid	Process
4992	nthtw.exe

Executes dropped EXE 2 IoCs

pid	Process
4992	nthtw.exe
5816	ypuivjvjy.exe

Loads dropped DLL 1 IoCs

pid	Process
5816	ypuivjvjy.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-552508041-2681165170-3229858294-1000\Software\Microsoft\Windows\CurrentVersion\Run\it = "c:\\Program Files\\tjchz\\ypuivjvjy.exe \"c:\\Program Files\\tjchz\\ypuivjvjy.dll\",Interface"	ypuivjvjy.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\d:	ypuivjvjy.exe
File opened (read-only)	\??\j:	ypuivjvjy.exe
File opened (read-only)	\??\n:	ypuivjvjy.exe
File opened (read-only)	\??\t:	ypuivjvjy.exe
File opened (read-only)	\??\y:	ypuivjvjy.exe
File opened (read-only)	\??\z:	ypuivjvjy.exe
File opened (read-only)	\??\a:	ypuivjvjy.exe
File opened (read-only)	\??\h:	ypuivjvjy.exe
File opened (read-only)	\??\i:	ypuivjvjy.exe
File opened (read-only)	\??\r:	ypuivjvjy.exe
File opened (read-only)	\??\v:	ypuivjvjy.exe
File opened (read-only)	\??\x:	ypuivjvjy.exe
File opened (read-only)	\??\q:	ypuivjvjy.exe
File opened (read-only)	\??\b:	ypuivjvjy.exe
File opened (read-only)	\??\k:	ypuivjvjy.exe
File opened (read-only)	\??\l:	ypuivjvjy.exe
File opened (read-only)	\??\m:	ypuivjvjy.exe
File opened (read-only)	\??\o:	ypuivjvjy.exe
File opened (read-only)	\??\w:	ypuivjvjy.exe
File opened (read-only)	\??\g:	ypuivjvjy.exe
File opened (read-only)	\??\p:	ypuivjvjy.exe
File opened (read-only)	\??\s:	ypuivjvjy.exe
File opened (read-only)	\??\u:	ypuivjvjy.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	ypuivjvjy.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	\??\c:\Program Files\tjchz\ypuivjvjy.exe	nthtw.exe
File opened for modification	\??\c:\Program Files\tjchz	nthtw.exe
File created	\??\c:\Program Files\tjchz\ypuivjvjy.dll	nthtw.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4524	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nthtw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ypuivjvjy.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4724	PING.EXE
4524	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ypuivjvjy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ypuivjvjy.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4724	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5816	ypuivjvjy.exe
5816	ypuivjvjy.exe
5816	ypuivjvjy.exe
5816	ypuivjvjy.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5816	ypuivjvjy.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2032	2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe
4992	nthtw.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 4524	2032	2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe	89
PID 4524 wrote to memory of 4724	4524	cmd.exe	91
PID 4524 wrote to memory of 4992	4524	cmd.exe	92
PID 4992 wrote to memory of 5816	4992	nthtw.exe	93

C:\Users\Admin\AppData\Local\Temp\2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nthtw.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4524
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4724
- - C:\Users\Admin\AppData\Local\Temp\nthtw.exe
    C:\Users\Admin\AppData\Local\Temp\\nthtw.exe "C:\Users\Admin\AppData\Local\Temp\2026-07-19_0ba781ab7666ee3efb6af55edfaecb3c_coinminer_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4992
  - - \??\c:\Program Files\tjchz\ypuivjvjy.exe
      "c:\Program Files\tjchz\ypuivjvjy.exe" "c:\Program Files\tjchz\ypuivjvjy.dll",Interface C:\Users\Admin\AppData\Local\Temp\nthtw.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5816

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

ypuivjvjy.exe

Path C:\Program Files\tjchz\ypuivjvjy.exe
Size 51KB
SHA256 ce6bb7eddc83762c708d4a41709ae00371dbdc09b2a380f28fa60b1edf917473
MD5 2e068ce2770fde8d1af4cb114b98df1f
SHA1 b6f9c2775babb025b22f915c3047aa627d07c312
SHA512 998d695eb56375e63df7db16740b89deb2cf630ccbead8bcf84a921ec6f4a4f9aef2755b703f7190f332b2008ebcc949363bcf8f392d7d07246c255b5073ed35
SSDEEP 1536:6G9yoVEpHP29I3fbcJboSUge5N+CnC/maz9Rh:8pv2mbcJboce58wvOR
TLSH
T137336C236A0A49B3DFE231780A9D7232526DD862075541F7A61057EAFD243E2EE743CF
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

nthtw.exe

Path C:\Users\Admin\AppData\Local\Temp\nthtw.exe
Size 235KB
SHA256 fbf2847856f793a9114df9773d170e91d5876664481f806c09013385d2cfc6af
MD5 33fbb06f84639aa05dbcc32420c2e1cd
SHA1 35629512a9801f24185c65763c462190109429b2
SHA512 8c52db72a31d3964c89872b1fbba63c7bebd72b59833c265e2f50de45a8c4660ad3a125cd34fe83c51613c7963b9e03c0241ec146b0cfbcfd890a7f5339cd55c
SSDEEP 6144:yOFgmYA/npA6SUqfjKfr4QdsICWkZ3h1SLCDFqnetKSoA:zgmYA/nsYf8QdsINkZ6CQetFx
TLSH
T17E34F18136A5DD77F06217BD0D7B163A8137BE691B00B49BD3C4AD4FB4319E4AE2E209
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

ypuivjvjy.dll

Path \??\c:\Program Files\tjchz\ypuivjvjy.dll
Size 168KB
SHA256 d302a83c5864f121caddadf4be1eaebe3ce2ab9cb944faaf3ea18ed4b1e4a06e
MD5 53d8f2a10a624a23da873170f46772aa
SHA1 8981f96c5c013298c99622039e1d05abe28832cc
SHA512 32f79e8483ce06426e5ac5a97959a386d2d59c4e1c4c2b3c38af995d7feaa97a280c0c0c704b7653c62001333fe505d94bb8f9c48ed87b6e8d653f1a78de2d01
SSDEEP 3072:S25S8qsPfVoCxEI5GRycgzQkf2+JKC8L1MwwYsg89R5gZMS:SJ8T1xE3ocg9f2nfLnwYsxf2Zd
TLSH
T15AF312D3EFB649E0C0361BB07C53C10FB8A20C6498715B5553D9BEEA3DA668E493D3A1
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5816-7-0x0000000010000000-0x000000001006D000-memory.dmp

Download

memory/5816-8-0x0000000010000000-0x000000001006D000-memory.dmp

Download

memory/5816-11-0x0000000010000000-0x000000001006D000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads